TWI630788B - Hybrid solar module - Google Patents

Abstract

The embodiment of the invention provides a hybrid solar module, which comprises a backboard, a plurality of photovoltaic cells, a plurality of concentrating photovoltaic cells and a transparent protection plate. A plurality of photovoltaic cells are arranged in an array on the backplane. a plurality of concentrating photovoltaic cells are disposed at intervals between adjacent four photovoltaic cells, wherein each of the four photovoltaic cells comprises first to fourth photovoltaic cells, wherein the first photovoltaic cells The right side, the lower right side, and the lower side are adjacent to the second to fourth photovoltaic cells, respectively. The light transmission protection plate is disposed on the plurality of photovoltaic cells and the plurality of concentrating photovoltaic cells.

Description

Hybrid solar module

The invention relates to a solar module, and in particular to a hybrid solar module with a photovoltaic cell and a concentrating photovoltaic cell.

Please refer to FIG. 1A and FIG. 1B. FIG. 1A and FIG. 1B are respectively a side cross-sectional view and a top plan view of a conventional solar module. The conventional solar module 1 has a metal frame 11, a back plate 12, a plurality of photovoltaic cells 13, a light transmissive encapsulation film 14, and a light transmissive protection plate 15. The metal frame 11 is used to support and protect the back plate 12, the photovoltaic cell 13, the light transmissive encapsulation film 14 and the transparent protective plate 1 to form a flat plate structure. A plurality of photovoltaic cells are arranged on the back plate 12 in an array manner 13 and covered by the light transmissive encapsulation film 14 , and the light transmissive protection plate 15 covers the light transmissive encapsulation film 14 .

The material of the metal frame 11 can be selected as lighter aluminum, the material of the back plate 12 can be selected as polyvinyl fluoride (PVF), the photovoltaic cell 13 is a twinned solar cell, and the material of the transparent encapsulating film 14 can be selected as a poly. The material of ethylene vinyl acetate (EVA), and the light-transmitting protective sheet 15 may be selected from glass. The plurality of photovoltaic cells 13 may be connected to each other in parallel or in series through a plurality of trace lines. Due to the gap between the plurality of photovoltaic cells 13, the conventional solar module 1 has a portion of the space that is an ineffective area UR that cannot generate electricity. Furthermore, the twin crystal solar cells are theoretically less than 30% due to material limitations, and generally have a power generation efficiency of only about 18%.

In addition to photovoltaic cells that can be used for solar power generation, prior art concentrating photovoltaic cells have been proposed, which have higher power generation efficiency. The concentrating photovoltaic cell can be, for example, a III-V solar cell, and its power generation efficiency can theoretically reach more than 35%, and actually has a power generation efficiency of 31%. However, compared with photovoltaic cells, concentrating photovoltaic cells are more expensive to manufacture and are therefore not suitable for laying on land or buildings over a large area.

In view of the above-mentioned problems of the prior art, it is an object of the present invention to provide a hybrid solar module.

According to at least one object of the present invention, a hybrid solar module includes a backing plate, a plurality of photovoltaic cells, a plurality of concentrating photovoltaic cells, and a light shielding plate. A plurality of photovoltaic cells are arranged in an array on the backplane. a plurality of concentrating photovoltaic cells are disposed at intervals between adjacent four photovoltaic cells, wherein each of the four photovoltaic cells comprises first to fourth photovoltaic cells, wherein the first photovoltaic cells The right side, the lower right side, and the lower side are adjacent to the second to fourth photovoltaic cells, respectively. The light transmission protection plate is disposed on the plurality of photovoltaic cells and the plurality of concentrating photovoltaic cells.

As described above, the hybrid solar module provided by the embodiment of the present invention is provided with a concentrating photovoltaic cell at intervals of each of the four photovoltaic cells adjacent to the battery. Compared with the conventional solar module, the hybrid solar module may have one or Multiple advantages:

(1) The area of the hybrid solar module will not increase, but the power generation per unit area will increase, and it can be arranged under a limited area of land or buildings to obtain a larger amount of power generation.

(2) Although the cost required for the concentrating photovoltaic cell is increased, the overall power generation is increased, so that the cost per watt of power generation is reduced.

(3) Similar to traditional solar modules, it is not necessary to significantly change the structure of traditional solar modules, which can increase the willingness of manufacturers to invest.

(4) The light-transmissive protective plate has an optical microstructure corresponding to the position of the concentrating photovoltaic cell to concentrate the sunlight to the concentrating photovoltaic cell to increase the power generation.

(5) The area of the optical microstructure is not large, so even if the spot is shifted, it is not easy to damage the photovoltaic cell.

1‧‧‧Traditional solar modules

11, 21 ‧ ‧ metal frame

12, 22‧‧‧ Backplane

13, 23‧‧‧Photovoltaic battery

14, 24‧‧‧Light transmissive film

15, 25‧‧‧Light protection board

2‧‧‧Hybrid solar modules

251‧‧‧Optical microstructure

26‧‧‧Concentrating photovoltaic battery

261‧‧‧Transparent protective layer

262‧‧‧III-V solar cell core

263‧‧‧ wire

264‧‧‧ circuit layer

265‧‧‧Substrate

CPV_CL, PV_CL‧‧‧ trace

UR‧‧ Invalid area

1A and 1B are respectively a side cross-sectional view and a top plan view of a conventional solar module.

2A and 2B are respectively a side cross-sectional view and a top plan view of the hybrid solar module of the embodiment of the present invention.

2C is a side cross-sectional view of the concentrating photovoltaic cell of the embodiment of the present invention.

The technical features, contents, and advantages of the present invention, as well as the advantages thereof, can be understood by the present inventors, and the present invention will be described in detail with reference to the accompanying drawings. The subject matter is only for the purpose of illustration and supplementary description. It is not necessarily the true proportion and precise configuration after the implementation of the present invention. Therefore, the scope and configuration relationship of the attached drawings should not be limited to the scope of patent application of the present invention. Narration.

It should be noted that although the terms "first", "second", "third" and the like are used herein to describe various elements, these described elements should not be limited by such terms. Such terms are only Used to distinguish another component from one component. Therefore, the "first" elements discussed below can be written as "second" elements without departing from the teachings of the present invention.

Embodiments of the present invention provide a hybrid solar module in which a concentrating photovoltaic cell is disposed at an interval between every four adjacent photovoltaic cells to improve the power generation efficiency of the hybrid solar module. Since the area between the intervals between every four adjacent photovoltaic cells is not large, setting the concentrating photovoltaic cells at the intervals does not significantly increase the manufacturing cost of the hybrid solar module. Moreover, after dividing the manufacturing cost by the power generation amount to obtain the cost per watt, the cost per watt of the hybrid solar module of the embodiment of the present invention can be lower than the cost per watt of the conventional solar module.

The hybrid solar module of the embodiment of the invention can also be used with the chasing system, and when the solar illuminance is strong, the power generation can be increased, and when the sun is weak, the power generation can be maintained. Compared with the conventional solar module, the hybrid solar module of the embodiment of the invention increases the spacing between the concentrating photovoltaic cells at every four adjacent photovoltaic cells while retaining the structure of the conventional solar module. Therefore, it is only necessary to easily modify the structure of the conventional solar module, so that the hybrid solar module has the advantages of simple manufacture and economic benefit. Briefly, the hybrid solar cell module of the embodiment of the present invention is similar to the conventional solar cell module, so that the manufacturer's willingness to invest can be improved. Moreover, compared to the traditional solar modules, the area of the hybrid solar modules has not increased, so that a larger amount of power can be obtained within a limited land area.

Please refer to FIG. 2A and FIG. 2B . FIG. 2A and FIG. 2B are respectively a side cross-sectional view and a top plan view of the hybrid solar module according to the embodiment of the present invention. The hybrid solar module 2 has a metal frame 21, a back plate 22, a plurality of photovoltaic cells 23, a light transmissive encapsulation film 24, a light transmissive protection plate 25, and a plurality of concentrating photovoltaic cells 26. The metal frame 21 is used to support and protect the back plate 22, the plurality of photovoltaic cells 23, the light transmissive encapsulation film 24, the light transmissive protection plate 25 and the plurality of concentrating photovoltaic cells 26. A plurality of photovoltaic cells 23 are arranged on the back plate 22 in an array and are covered by the light transmissive encapsulation film 24. The transparent protective plate 25 is overlaid on the light transmissive encapsulation film 24. The concentrating photovoltaic cell 26 is formed at a space between adjacent photovoltaic cells 23 and is covered by the light transmissive encapsulation film 24.

The material of the metal frame 21 can be selected as a light-weight aluminum, the material of the back plate 22 can be selected as a polyvinyl fluoride (PVF), the photovoltaic cell 23 is a twinned solar cell, and the material of the transparent encapsulating film 24 can be selected as a poly. The ethylene vinyl acetate (EVA), the material of the light-transmitting protective plate 25 may be selected as glass, and the concentrating photovoltaic battery 26 may be a III-V solar battery. A plurality of photovoltaic cells 23 may be connected to each other in parallel or in series through a plurality of traces PV_CL, and a plurality of concentrating photovoltaic cells 26 may be connected to each other in parallel or in series via a plurality of traces CPV_CL.

Since the concentrating photovoltaic cell 26 is relatively expensive, and the four corners of the existing photovoltaic cell 23 have a missing angle, in the embodiment of the present invention, four of each of the four photovoltaic cells 23 adjacent to each other A concentrating photovoltaic cell 26 is disposed in the inactive region of the space formed at the corner. Preferably, the photovoltaic cell 23 has a length and width of about 10 cm to 16 cm, and the concentrating photovoltaic cell 26 has a length and width of about 0.3 mm to 10 mm. Further, each of the four photovoltaic cells 23 adjacent to each other includes first to fourth photovoltaic cells 23, and the right, bottom, and bottom sides of the first photovoltaic cells 23 are adjacent to the second to fourth, respectively. Photovoltaic battery 23

In addition, in order to properly utilize the higher power generation efficiency of the concentrating photovoltaic cell 26, the hybrid solar cell module 2 has better power generation efficiency. The transparent protective plate 25 has an optical microstructure 251 corresponding to the position of the concentrating photovoltaic cell 26, wherein the optical microstructure 251 has a positive tortuous force and may be convex to focus the sunlight on the corresponding concentrating type. Photovoltaic battery 26. Briefly, the light-transmissive protective plate 25 has a planar and convex portion, not a full-plane transparent protective plate, wherein the convex portion corresponds to the concentrating photovoltaic cell 26, which can focus the sunlight on the concentrating photovoltaic device. The battery 26, while the planar portion corresponds to the photovoltaic cell 23, allows sunlight to be directed toward the photovoltaic cell 23. Thus, the power generation per unit area of the hybrid solar battery module 2 can be made higher than the power generation per unit area of the conventional solar battery module. In addition, the transparent protective plate 25 can be molded through glass, silicone glass It is produced by means of silicone on glass (SOG) and plastic injection molding, and the invention is not limited thereto. On the other hand, since the area of the optical microstructure 251 is not large, the photovoltaic cell 23 is not easily damaged even if the spot is shifted.

Next, please refer to FIG. 2C of the present invention, and FIG. 2C is a side cross-sectional view of the concentrating photovoltaic cell of the embodiment of the present invention. One of the implementations of the aforementioned concentrating photovoltaic cell 26 can be as shown in FIG. 2C, but the invention is not limited thereto. The concentrating photovoltaic cell 26 includes a transparent protective layer 261, a III-V solar cell 262, a wire 263, a circuit layer 264, and a substrate 265. The circuit layer 264 is located on the substrate 265, the III-V solar cell 262 is located on a portion of the circuit layer 264, and the other portion of the circuit layer 264 is connected through the wire 263, and the transparent protective layer 261 is used to cover and protect the III-V family. The solar cell core 262, the wire 263, the circuit layer 264 and the substrate 265, wherein the material of the transparent protective layer 261 can be selected as an optical silicone, and the shape thereof can be selected as a semi-cylindrical body, as a secondary optical element having a concentrating effect, and The material of the wire 263 can be selected from gold. It should be noted here that the material and shape of the transparent protective layer 261 and the material of the wires 263 are not intended to limit the present invention.

In addition, please refer back to FIG. 2A and FIG. 2B. The number of concentrating photovoltaic cells 26 in the hybrid solar module 2 of the embodiment of the present invention can also be flexibly adjusted according to the climatic conditions of the installation site. For example, in a region with better sunshine conditions, a larger number of concentrating photovoltaic cells 26 can be disposed at a plurality of intervals.

Furthermore, a photovoltaic cell 23 having a length and a width of about 10 to 16 cm has a market price of about 65 US dollars, and it can generate about 130 watts of power generation, and a concentrating type having a length and a width of about 0.3 to 10 mm. The market price of photovoltaic cells 26 is about $8.4, and it can generate about 24 watts of power. If a plurality of photovoltaic cells 23 are arranged in a 4x9 array, there will be 3*8=24 intervals to arrange the concentrating photovoltaic cells 26. The cost per watt of conventional solar modules arranging photovoltaic cells in the above 4x9 array is about 0.5 US dollars, and the hybrid solar cells 23 and the concentrating photovoltaic cells 26 are arranged in the above 4×9 array. The cost per watt of power generated by Module 2 is approximately $0.483, which is the cost per watt of electricity generated. Reduced by about 3.5%. In addition, if the photovoltaic cells 23 are arranged in an array of MxN, when the values of M and N are large, the ratio of the number of photovoltaic cells 23 to the concentrating photovoltaic cells 26 will be closer to one, and The cost per watt of power generated by the hybrid solar module 2 is about $0.477, which is a cost reduction of about 5% per watt of power generation.

In summary, the hybrid solar module of the embodiment of the present invention can reduce the cost per watt of power generation, and only needs to be easily modified by the conventional solar module, that is, the hybrid solar module can be realized, so Increase the willingness of manufacturers to invest. On the other hand, the area of the above hybrid solar module does not increase, but it can increase the amount of power generated per unit area.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

Claims (10)

A hybrid solar module comprises: a backing plate; a plurality of photovoltaic cells, arranged in an array on the backing plate; a plurality of concentrating photovoltaic cells, disposed in each adjacent four photovoltaic cells An interval between the four photovoltaic cells comprising a first to a fourth photovoltaic cell, wherein the right side, the lower right side and the lower side of the first photovoltaic cell are adjacent to the second to the second Four photovoltaic cells; and a light-transmissive protective plate disposed on the photovoltaic cells and the concentrating photovoltaic cells. The hybrid solar module of claim 1, wherein the transparent protective plate has a convex portion and a planar portion, wherein the convex portion is divided into a plurality of optical microstructures, and positions of the optical microstructures Corresponding to the concentrating photovoltaic cells. The hybrid solar module of claim 1, further comprising: a light transmissive encapsulating film for coating the photovoltaic cells and the concentrating photovoltaic cells. The hybrid solar module of claim 3, further comprising: a metal frame for supporting the backboard, the photovoltaic cells, the concentrating photovoltaic cells, and the transparent packaging film A flat plate structure formed with the light-transmitting protective sheet. The hybrid solar module of claim 1, further comprising: a plurality of first traces for electrically connecting the photovoltaic cells to each other; and a plurality of second traces for concentrating the light The photovoltaic cells are electrically connected to each other. The hybrid solar module of claim 2, wherein the optical microstructures have a positive tortuosity to focus sunlight on the concentrating photovoltaic cells. The hybrid solar module of claim 1, wherein the photovoltaic cell is a twin solar cell, and the concentrating photovoltaic cell is a III-V solar cell. The hybrid solar module of claim 4, wherein the backing plate is made of polyvinyl fluoride, the transparent encapsulating film is made of polyvinyl acetate, and the transparent protective plate is made of glass. And the material of the metal frame is aluminum. The hybrid solar module of claim 1, wherein the photovoltaic cell has a length and a width of 10 cm to 16 cm, and the concentrating photovoltaic cell has a length and a width of 0.3 mm to 10 PCT. The hybrid solar module of claim 1, wherein the concentrating photovoltaic cell comprises: a substrate; a circuit layer on the substrate; a wire; a III-V solar cell, Located on a portion of the circuit layer and connected to another portion of the circuit layer through the wire; and a transparent protective layer for covering and protecting the III-V solar cell, the wire, the circuit layer and the substrate.